Mumbai, Nov. 28 -- GAIL (India) Ltd fell 5.55% today to trade at Rs 173.6. The BSE Oil & Gas index is down 0.52% to quote at 28334.49. The index is down 0.66 % over last one month. Among the other constituents of the index, Hindustan Petroleum Corporation Ltd decreased 0.69% and Indian Oil Corporation Ltd lost 0.61% on the day. The BSE Oil & Gas index went up 6.74 % over last one year compared to the 8.54% surge in benchmark SENSEX. GAIL (India) Ltd has lost 6.04% over last one month compared to 0.66% fall in BSE Oil & Gas index and 0.93% rise in the SENSEX. On the BSE, 4.76 lakh shares were traded in the counter so far compared with average daily volumes of 6.84 lakh shares in the past one month. The stock hit a record high of Rs 213.3 o...